Update actions/configure-pages action to v2

Author: renovate[bot]

.github/workflows/GHPages.yml

@@ -33,7 +33,7 @@ jobs:
           export NODE_OPTIONS="--max-old-space-size=8192"
           yarn docs:build
       - name: Setup Pages
-        uses: actions/configure-pages@v1
+        uses: actions/configure-pages@v2
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v1
         with: